[ceslami]

What do you mean by "put my Amex into my phone once...and let apple handle it"? Is this a component of Passbook or something?

[rdl]

I mean in iTunes, and just buy stuff via iTunes. There are obviously many serious problems with that. (Apple's policies, 30% cut, etc.)

In practice what I do is just buy things from Amazon, whether it is on my phone or laptop, so the critical thing is being logged in to amazon.com.